How To Fix WSTI_CALC018 - Internal error: Required parameters not specified

WSTI_CALC018 - Overview

• Message type: E = Error

• Message class: WSTI_CALC - Physical Inventory Messages: Book Inv. Calc. at Count Time

• Message number: 018

• Message text: Internal error: Required parameters not specified

What causes this issue?

Some required parameters were not specified when a function module was
accessed.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

This is an internal error that you will not be able to correct yourself.
Notify your system administrator. Some of the data may not have been
processed.

Procedure for System Administrators

This message is displayed by function modules
WSTI_STOCK_CALCULATE_SERIAL, WSTI_STOCK_SIMULATE, and
WSTI_STOCK_DATA_QUERY.

Error message extract from SAP system. Copyright SAP SE.

WSTI_CALC018 - Details

• The SAP error message:
  WSTI_CALC018 Internal error: Required parameters not specified
  
  Cause
  This error typically occurs during the calculation or processing of time evaluation or time-related functions in SAP HR (Human Resources) or Payroll modules. The message indicates that some mandatory input parameters required for the internal function or routine are missing or not passed correctly.
  Common causes include:
  
  Missing or incomplete configuration in time evaluation schemas or rules.
  Incorrect or incomplete data in infotypes related to time management (e.g., Infotype 0007 - Planned Working Time, Infotype 0008 - Basic Pay).
  Missing or incorrect parameters in function modules or custom enhancements related to time evaluation.
  Issues in the integration between time evaluation and payroll or other HR components.
  Custom code or user exits/enhancements that call standard SAP functions without providing all required parameters.
  
  
  Solution
  
  
  Check the Time Evaluation Configuration:
  
  Verify the time evaluation schema and rules to ensure all required parameters are correctly maintained.
  Check the configuration of work schedules, planned working times,